Method of stripping an insulated magnet wire and apparatus for practicing the method

Abstract

An insulated magnet wire, being pushed against the arcuate guide surface of a guide member, is held in semi-circular stripping cuts formed respectively in a pair of clamping parts forming a clamp tool which are opened and closed by being turned about a fulcrum. Under this condition, the clamp tool 10 is moved along the magnet wire, to cause the semi-circular stripping cuts to strip the magnet wire.

What is claimed is: 
     
       1. A method of stripping an insulated magnet wire which comprises steps of: deflecting the insulated magnet wire by contacting the insulated magnet wire with an arcuate guide surface of a guide member;   pivoting a pair of clamping parts having stripping portions about a pivot point so as to contact the insulated magnet wire and move the insulated magnet wire along the arcuate guide surface of the guide member until the insulated magnet wire is clamped between the clamping parts at the stripping portions; and   moving either the pair of clamping parts having the stripping portions or the insulated magnet wire in a direction of a longitudinal axis of the insulated magnet wire to strip the insulated magnet wire.   
     
     
       2. A method of stripping an insulated magnet wire as recited in claim 1, wherein in said step of pivoting the pair of clamping parts, the pair of clamping parts are pivoted so that a path swept by the stripping portions follows the arcuate surface of the guide member.   
     
     
       3. A method of stripping an insulated magnet wire as recited in claim 1, wherein in said step of pivoting the pair of clamping parts, the pair of clamping parts are pivoted so that when the insulated wire is clamped between the clamping parts at the stripping portions, the arcuate guide surface is adjacent to the stripping portions.   
     
     
       4. A method of stripping an insulated magnet wire as recited in claim 1, wherein said step of pivoting the pair of clamping parts comprises steps of: inserting and retracting a cam between the pair of clamping parts to open and close the pair of clamping parts.   
     
     
       5. A method of stripping an insulated magnet wire which comprises steps of: contacting the insulated magnet wire with a press-down member to deflect the insulated magnet wire and press the insulated magnet wire against an arcuate guide surface of a guide member;   pivoting a pair of clamping parts having stripping portions about a pivot point so as to contact the insulated magnet wire and move the insulated magnet wire along the arcuate guide surface of the guide member until the insulated magnet wire is clamped between the clamping parts at the stripping portions; and   moving either the pair of clamping parts having the stripping portions or the insulated magnet wire in a direction of a longitudinal axis of the insulated magnet wire to strip the insulated magnet wire.   
     
     
       6. An apparatus for stripping an insulated magnet wire comprising: a guide member having an arcuate guide surface for deflecting and guiding the insulated magnet wire; and   a pair of clamping parts having wire stripping portions, the pair of clamping parts being pivotable about a pivot point so as to contact the insulated magnet wire and move the insulated magnet wire along the arcuate guide surface of the guide member until the insulated magnet wire is clamped between the clamping parts at the wire stripping portions.   
     
     
       7. An apparatus as claimed in claim 2, wherein each of the wire stripping portions is tapered in such a manner that an inside diameter thereof is larger in a direction of movement of the pair of clamping parts along the insulated magnet wire. 
     
     
       8. An apparatus as claimed in claim 2, wherein the pair of clamping parts include a pair of arms, respectively, in such a manner that the arms are integral with the clamping parts, and a spring is interposed between the pair of arms. 
     
     
       9. An apparatus as claimed in claim 2 further comprising: an opening and closing mechanism for swinging the pair of clamping parts about the pivot point so as to open and close the clamping parts.   
     
     
       10. An apparatus as claimed in claim 2 further comprising: a moving mechanism for moving one of the pair of clamping parts having the stripping portions and the insulated magnet wire longitudinally of the insulated magnet wire, to strip the insulated magnet wire.   
     
     
       11. An apparatus for stripping an insulated magnet wire as recited in claim 6, wherein the pivot point is disposed so that a path swept by the stripping portions follows the arcuate surface of the guide member. 
     
     
       12. An apparatus for stripping an insulated magnet wire as recited in claim 6, wherein the pivot point is disposed so that when the insulated wire is clamped between the clamping parts at the stripping portions, the arcuate guide surface is adjacent to the stripping portions. 
     
     
       13. An apparatus for stripping an insulated magnet wire as recited in claim 9, wherein said opening and closing mechanism comprises: a support (25);   a clamp drive member (26) slidably supported within said support, said clamp drive member having a conical surface (27) at an end of said clamp drive member protruding from said support, said conical surface engaging outer surface portions of the pair of clamping parts so as to open and close the pair of clamping parts when the clamp drive member is slidably extended and retracted from said support;   a spring for biasing said clamp drive member in a direction to open the pair of clamping parts; and   a cylinder (35) having a piston rod (35a) which contacts said clamp drive member to move said clamp drive member against a biasing force of said spring.   
     
     
       14. An apparatus for stripping an insulated magnet wire as recited in claim 13, wherein said support (25) is rotatably supported on a frame (23), and wherein said support (25) comprises an arm (32), said apparatus further comprising a cam (33) for contacting said arm to rotate said support in a longitudinal direction of the insulated magnet wire. 
     
     
       15. An apparatus for stripping an insulated magnet wire as recited in claim 6, wherein said pair of clamping parts are rotatably mounted on a shaft (13) embedded in said guide member. 
     
     
       16. An apparatus for stripping an insulated magnet wire as recited in claim 6, wherein said moving mechanism comprises: frame (23); and   a support (25) rotatably supported on said frame and pivotable in a longitudinal direction of the insulated magnet wire, said pair of clamping parts being rotatably supported on said support so as to be pivotable in a direction substantially transverse to the longitudinal direction of the insulated magnet wire.   
     
     
       17. An apparatus for stripping an insulated magnet wire as recited in claim 16, wherein said support (25) comprises an arm (32), and wherein said apparatus for stripping comprises a piston rod (34) having a cam (33), said cam contacting said arm when said piston rod is extended and retracted to rotate said support back and forth in the longitudinal direction of the insulated magnet wire. 
     
     
       18. An apparatus for stripping an insulated magnet wire as recited in claim 6, further comprising: a cam disposed between said pair of clamping parts, said cam being inserted and retracted to open and close said pair of clamping parts.   
     
     
       19. An apparatus for stripping an insulated magnet wire comprising: a stationary guide on which the insulated magnet wire is set so as to be fixed in position;   a movable guide moved towards the stationary guide to hold the insulated magnet wire in cooperation with the stationary guide; and   a pair of pivotably supported clamping parts having wire stripping portions, wherein   a free end of the insulated magnet wire is disposed in a space defined between the stationary guide, the movable guide and the pivotally supported clamping parts, the movable guide being moved towards the stationary guide to secure the free end of the insulated magnet wire between the stationary guide and the movable guide, and wherein   the clamping parts are pivoted so that the wire stripping portions grip the insulated magnet wire adjacent the movable guide and the stationary guide, wherein the clamping parts are moved in a longitudinal direction of the insulated magnet wire for stripping the insulated magnet wire.   
     
     
       20. An apparatus for stripping an insulated magnet wire comprising: a guide member having an arcuate guide surface for guiding the insulated magnet wire;   a press-down member for deflecting the insulated magnet wire and f or pressing the insulated magnet wire against the arcuate guide surface of the guide member; and   a pair of clamping parts having wire stripping portions, the pair of clamping parts being pivotable about a pivot point so as to contact the insulated magnet wire and move the insulated magnet wire along the arcuate guide surface of the guide member until the insulated magnet wire is clamped between the clamping parts at the wire stripping portions.